Learn Python The Hard Way学习(24) - 更多的练习

上一篇：http://www.2cto.com/kf/201206/136910.html

我们正从单纯的输入练习转移到学习代码的真正工作，我们需要做更多的练习。下面的练习比较长，考研你的耐心，下章的练习也一样。开始吧，保证你的输入正确。

[python]
print "Let's practice everything." 
print 'You/'d need to know /'bout escapes with // that do /n newlines and /t tabs.' 
 
 
poem = """
/tThe lovely world
with logic so firmly planted
cannot discern /n the needs of love
nor comprehend passion from intuition
and requires an explanation
/n/t/twhere there is none.
""" 
 
 
print "-----------" 
print poem 
print "-----------" 
 
 
five = 10 - 2 + 3 - 6 
print "This should be five: %s" % five 
 
 
def secret_formula(started): 
    jelly_beans = started * 500 
    jars = jelly_beans / 1000 
    crates = jars / 100 
    return jelly_beans, jars, crates 
 
 
start_point = 10000 
beans, jars, crates = secret_formula(start_point) 
 
 
print "With a starting point of: %d" % start_point 
print "We'd have %d beans, %d jars, and %d crates." % (beans, jars, crates) 
 
 
start_point = start_point / 10 
 
 
print "We can also do that this way:" 
print "We'd have %d beans, %d jars, and %d crates." % secret_formula(start_point) 

运行结果
Let's practice everything.
You'd need to know 'bout escapes with / that do
 newlines and   tabs.
-----------

The lovely world
with logic so firmly planted
cannot discern
 the needs of love
nor comprehend passion from intuition
and requires an explanation

where there is none.

-----------
This should be five: 5
With a starting point of: 10000
We'd have 5000000 beans, 5000 jars, and 50 crates.
We can also do that this way:
We'd have 500000 beans, 500 jars, and 5 crates.

加分练习
1. 反复阅读你的代码，朗读你的代码，给容易混淆的地方做注释。

作者：lixiang0522